Balanced valve.



J. G. BAIN.

BALANGBD VALVE.

APPLIOATION FILED 111111.10, 1913.

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JAMES Gr. BAIN, OF EMPORIA, KANSAS.

BALANCED VALVE.

Specification of Letters Patent.

Patented June 16, 1914.

Application filed March 10, 1913. Serial No. 753,393.

To all whom it may concern Be it known that I, JAMES G. BAIN, a citizen of the United States, residing at Emporia, in the county of Lyon and State of Kansas, have invented certain new and useful Improvements in Balanced Valves; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention is a balanced valve, and its object is to provide a device of this character whereby the surplus of water within steam or the air that may be mixed with steam is permitted to escape automatically, but the escape is shut of and the valve is closed by a thermostat. This object is carried out by employing the construction hereinafter more fully described and claimed, and as shown in the drawings wherein# Figure 1 is a side elevation of this device in its preferred form, and Fig. 2 is a vertical longitudinal sectional view thereof. Fig. 3 is a horizontal section on the line 3-3 of Fig. 2. Fig. 4 is a vertical section of a slightly different form. Fig. 5 is a vertical section through the thermostat preferably employed in connection with this device.

In the drawings the numeral 1 designates a casing preferably made in two parts having anges 2 which are suitably connected so that the parts may be separated to permit the user to gain access to the interior. The bottom 3 of this casing has a nipple 4 to which may be connected a pipe constituting the inlet, and a second nipple 5 ground at its upper end with a valve seat 6, and within this nipple is located a valve 7 adapted to close upwardly against said seat. The bottom 3 also by preference carries a standard 8 in which at 9 is pivoted a lever 10, one end of which has an eye 11 (or a fork or other device) loosely connected with or embracing the stem 12 of the valve, which stem projects upwardly from its body 7 and carries a weight 13 at its upper end. Between the eye 11 and the weight 13 an expansive spring 14 is coiled around the stem 12 as shown, The other arm of the lever 10 in the pre'- ferred construction of my device best seen in Fig. 2, stands over the inlet 4, although as seen from Fig. 4 this is not absolutely necessary. This arm carries a plug 15 which is attached to the lower corrugated wall 16 of al thermostat, the latter also having a surrounding or annular wall 17, an upper corrugated wall 18, and an expansive fluid 19 within its interior. Mounted on said upper wall 18 is an upper plug 20, whose upper end is preferably reduced and shouldered as at 21, above which it has a pin 22 movably mounted in a socket in a boss 23 carried by or formed integral with the top wall of the casing 1.

While I have thus specifically described the thermostat I prefer to use, it will be clear that any other form may be employed which will operate successfully as set forth below. I consider it essential, or at least desirable, that the thermostat and the plugs thereof shall overbalance the valve, its stem, and the weight 13.

In the construction shown in Fig. 4, the disposition of parts is about the same, save that the inlet 4 is at oney side of the casing 1 instead of directly beneath the thermostat, and in this instance the top plate 3 may be removably connected with the casing as by the screw threads illustrated.

In the use of this improved valve, the nip ple 4 is connected up with an inlet pipe led from a source of steaml supply, such as a steam engine boiler or a steam heating system for instance. I do not wish to be limited in the use of the device, but give these suggestions for sake of illustration only. When the steam is turned on 1t may contain considerable water or air, or it may be possible that water only will flow through the inlet pipe at first. In any event, however, the inlet of liquid or fluid with the construction shown in Fig. 2 will be projected with considerable force against the lower side of the thermostat, with tne result that the lever 10 is rocked on its pivot 9 so that the valve is borne downwardly and unseated; but with the construction shown in Fig. 4 the infiowing liquid or fluid will produce pressure on the air trapped within the device and will open the valve by this air pressure-the preponderance of weight possessed by the thermostat over the elements at the other end of the lever being in either case oifset by the inrush of the liquid or fluid. It will be clear that cold or cool water or cold or cool air will find its escape through the open valve, but when hot steam enters through the inlet its heat will expand the thermostat. As the latter rises when cold liquid or fluid is admitted, the pin 22 moves upwardly within the socket of the boss23 until its upward movement was limited by the shoulder 21 striking said boss, and the valve opens to a corresponding degree. When now hot steam flows into the device (although its impact with the con` struction shown in F ig. 2 may yet tend to raise the thermostat) its heat expands the fluid 19 within the thermostat and the lower wall 16 thereof pushes downward on the lower plug 15-this tilts the lever 10 over its pivot 9 and raises the valve and valve stem until the former closes against its seat.

The purpose of the spring 14 is to permit the excessive expansion of the thermostat as might occur if the steam were very hot, for in that case the continued movement of the lever 10 in this direction would only compress the spring 14 upward against the weight 13, and would break nothing. However, the closing of the valve terminates the outlet of water or air which may have been with the steam, and therefore prevents the escape of live steam, which is the purpose of the invention. It is quite obvious that the same action will take place with the construction shown in F ig. 4L, save that in .this device the thermostat is not subject to the impact of the Huid or liquid admitted through the inlet.

The parts are of various sizes, proportions and materials, and changes in details may be made without departing from the principles of the invention.

Vhat is claimed as new is:

1. The combination with a casing having an inlet adapted to be connected with a source of steam supply and an outlet provided with a valve seat; of a valve for the latter closable toward the casing and into which its stem projects, a thermostat within said casing heavier than the valve, connections between said thermostat and valve wherebythe latter is held normally closed by the weight of the thermostat rising from the thermostat toward but normally out of contact with the casing, fori the purpose set forth.

2. The combination with a casing having an inlet adapted to be connected with ai' and an outlet pro-fl source of steam supply vided with a valve seat; of a valve for the latter closable toward the casing and into which its stem projects, a thermostat within and a plug said casing heavier than the valve, a lever? connecting said thermostat and valve andj pivoted between its ends to the casingf whereby said valve is held normally closed, a plug depending from the thermostat andf engaging one end of said lever, and a second i plug rising from the thermostat toward but normally out of contact with the top of the casing, for the purpose set forth.

3. The combination with a casing having an inlet adapted to be connected with a source of steam supply and an outlet provided with a valve seat; of a valve for the latter closable toward the casing and into which its stem projects, a thermostat within said casing heavier than the valve, a standard within said casing, a lever pivoted between its ends in said standard and having an eye at one extremity loosely engaging said valve stem, a weight on the latter tending to open the valve, an expansive spring between said eye and weight, a thermostat connected with the other arm of said lever, and a plug on the thermostatrising toward but normally out of contact with the top .of the valve casing, for the purpose set forth.

t. The combination with a casing having an inlet adapted to be connected with a source of steam supply and an outlet provided with a valve seat; of a valve for the latter closable toward the casing and into which its stem projects, a thermostat within said easing heavier than the valve, a standard within said casing, a lever pivoted between its ends in said standard and hav- -ing an eye at one extremity loosely engaging said valve stem, a weight on the latter tending to open the valve, an expansive spring between said eye and weight, a thermostat whose upper and lower walls have upwardly and downwardly projecting plugs, the latter of which is engaged with the opposite arm of said lever and the former of which has a reduced pin at' its upper end, and a socketed boss depending from the top of said casing and within which said pin is loosely mounted, for the purpose set forth.

5. The combination with a casing having an inlet adapted to be connected with a source of steam supply and an outlet provided with a valve seat; of a valve for the latter closable toward the casing and into which its stem projects, a thermostat within said casing heavier than the valve, a standard within said casing, a lever pivoted between its ends in said standard and having an eye at one extremity loosely engaging said valve stem, a weight on the latter tending to open the valve, an expansive spring between said eye and weight, a thermostat whose upper and lower walls have upwardly and downwardly projecting plugs, the latter of which is engaged with the opposite arm of said lever and the former of which has a reduced pin at its upper end, and a soclreted boss depending from the top of said casing and within which said pin is loosely mounted, for the purpose set forth.

6. The combination with a casing having an inlet adapted to be connected with a source of steam supply and an outlet provided with a valve seat; of a valve for the latter, a thermostat movably mounted within the casing and heavier than said valve,

mally holds the latter closed, the thermostat being so disposed as to receive the impact of inflowing steam, for the purpose set forth.

In testimony whereof I have hereunto 15 set'my hand in presence of two subscribing witnesses.

JAMES G. BAIN.

Witnesses:

W. N. SMELSER, ToBY BALL.

Copies of this patent may be obtained for nve cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

